Cutting mechanism



Nov. 14, 1933. N. SINGER CUTTING MECHN'ISM 3 sheets-sheet 1 Filed Jan. 8. 1951 NOV. 14, 1933. N, slNGER 1,934,997

CUTTING MEGHANISM A Filed Jan. 8, 1931 3 Sheets-Sheet 2 gin/vento@ Nov.'14, 1933. N. SINGER CUTTING MECHANISM Filed Jan. '8, 1931 3 sheets-'sheet s v particular illustrative,embodiment'thereof, and

Patented Nov. v14,` 1933 UNITI-1D# @STATES 1 This invention `relates -to a; machine and method for cutting off predetermined lengths of a continuouslymoving length of material without mutilation at the point of severing and without f5 bending or.buckling.\ 1

It vris an object ofthe invention to provide a machine-of this type 'which will be effective in use and which may .-beoperated `at highV speed. It is a further object of the invention to provide an.

improved method of` cutting movingmaterialinto predetermined lengths Other vobjects and-advantages of` the invention will appear hereinafter. f

be betterundersto'odfrom -a f description of a for`.the purposeof such description reference should be had to the accompanying drawings forming a part hereof, and in which:

Fig.- 1 is ank end-elevation of `they illustrative embodiment;

Fig. 2 is a plan viewof the machine; Fig.'.3vis asectionalfview taken substantially on the linev 3`3 of Fig. 2'; j v .-`Fig. 4 isa perspectiveview of the machine; and fi-Figs.' 5 and 6 are detail'A views of parts of the machine. Y

Inasmuch as vthisinv'ention isvof particular utility in the manufacture of. paper tubes, the illustrative embodiment discloses `a machine designed for cutting such tubes. yMany vof the tube forming machines in` use at the present time produce a tube-which is continuouslyformed and fed from the machine in one rotating length, and which must thereafter be severed into the desired short sections. Thev machine herein illustrated is provided for this purpose, and in operation 'may be secured to and made a part of the general tube forming machine. However, all v illustration of any tube forming mechanism has j been omitted, the drawings merely showing the tube 11 as it is being fed forward from the `forming machine.

In order to support the tube duringthe cutting operation, and to prevent bending and buckling,l

a tube `guide 12 is provided. Convenientlyl the tube guide 12 is rigidly secured in the upper end of a standard 13 mounted on a bed lfwhichsustains the operating parts of the machine and in v turn is supported bythe legs 15, In the illustrative embodiment the tube guide 12 comprises a funnel shaped entrance portion and a relatively long tubular portion, the latter being cutr away; j. along one' side, as at 16, thereby forming agrooved section exposing the moving tube- 11, so that the` The naturevand objects'of the invention will tube may be severed in the manner hereinafter described while supported by the grooved section of the guide against lateral deflection; f

The tube cutting mechanism is herein shown as a rotary'disk cutter 17, which may take the form of a saw, secured to aspindlepl which is rotatablyy mounted on bearings 36, and which carries rigid therewith a driving'pulley 19. Thev driving pulley isconnected by' a belt 20 passing over idler rollers 21 and 22 with a pulley y23 fastened on the end of a shaftZl. The shaft/24 is rotatably mounted in abracket 25, Vconveniently secured to a leg 15, and is `operatively connected,

as by vmeans of thebevelgears 26, shaft 27 and bevel gears28,.to a driving shaft 29. -The driving shaft 29 may be connected, conveniently by the pulley'30 and a belt 31, With a driving motor, V(not shown). Y Y

Desirably the'Y cutting machine and the ytube forming machine will'be driven from the same prime mover in order that the speed relation will remain constant, therebyinsuring the cutting off of equaljlengths of tube at all'times irrespective PA'TENroFl-lcs 'f of any variations in the speed of the primemover.

Conveniently thedriving connection for the tube forming 'machine maybe made fromV theshaft 29, yas by means of the, bevelgears 32 andthe Shafts.' f 1, Y Y,

The bearings 36 on which the disk cutter spindle 18 is rotatably mounted form a part of the bracket 37. The bracket 37 is rigidly secured to the hinge spindle 38 pivotally mounted in bearings on the slide 39. Means are provided normally tending to turn the bracket 37 in an upward direction to keep the disk cutter out of the path of the moving tube' 11, such means conveniently taking the form of a spiral tension spring 40 connecting the bracket 37 and the top of theslide 39.v f

Movement of the bracket 37 downwardly against the force of the spring 40 moves the rotating disk cutter 17 intothe path of the movingV tube 11 adjacent the grooved portionrl of ythe tube guide, the tube 11 being supported against transverse deflection by the grooved guide. Since Y kthe tube 11 is rotating,Y the tube may be comprevent buckling of the tube.v

bodiment has a single raisedv section for turning the bracket 3'7 downwardly once during each Y revolution of the cam member 45.

The cam member 45 is secured on a shaft 46 mounted in suitable bearings in a head 47 attached to the bed 14. Conveniently the shaft 46'is driven by means of the bevel gears 48 connecting it with the rotating shaft 27 previously referred to.

Since the tube 11 is moving along the stationary grooved guide 16 continuously during the severing operation, means are provided for moving the disk cutter 17 in the same direction and at substantially the same speed, as the tube during the time that the disk cutter projects into the path of movement of the tube in order to prevent mutilation of the tube at the point of cut-off and to In :the'illustrative embodiment the .slide y39 which carries the disk cutter bracket 37 has on its opposite face a longitudinally extending slideway tted with a gib 49,`and engaging slide blocks v50 securedon theihead 47V, whereby the slide may move in a path Vparallel to that of the tube 11. Means are provided for reciprocating the slide 39 in synchronism with the periodic movement of the disk cutter 17. into. and out of the path of the movingr tube. In the illustrative embodiment the slide 39 has in its slide-way a cam pin and bushingl l'engaging an eccentric cam groove Y52 in a face of therrotatable cam member 45, whereby ro- .tation of the cam member 45 causes the slide 39 to reciprocate on the slide blocks 50, the relation of the cam track 44 and the cam groove 52 being such that during the time the disk cutter l? is being moved into and'out of the path of the tube 11, the slide 39 is moving in the direction `and at substantially the speed of the tube.

' It will be apparent from the foregoing description that applicant has provided a machine and method for 1 cutting a continuously moving length of material'into predetermined lengths capable of eiective operation at high speed without damage to the length of material, or excessive wear on the parts of the machine. VThe continuous length y bracket 42 and over the top of the slide 39, and

of material moves along a stationary guide which conveniently is grooved to aid in preventing lateral deiiection of the material during the severing operation. A cutter mounted to one side of thevguide is reciprocated along a path parallel to that of the moving material, and periodically is moved toward the guide into the path of the material to sever it, the material being supported against bending throughout the cutting operation by the guide.

The description of the illustrative embodiment ris illustrativemerely and is not intended as derlning'the limits of the invention.

I claim: y

l. In a machine for 'cutting a continuously formed length of moving material into predetermined lengths, the combination of a stationary grooved guide along which the material moves in an exposed condition, a disk cutter mounted to one side of the guide and.normally out of the path of movement of the material, means for rotating the diskcutter, means Vfor reciprocating the disk cutter along a path'parallel to that of the moving material, and means for periodically moving the disk cutter toward and awayV from the guide, into and out of the path of the moving material, when the disk cutter `is moving inthe same direction and at? substantially the same speed asthe material. Y f

2. In a machine for cutting a continuous length of material which .both rotates and moves longitudinally into predetermined lengths, `the combination of a stationary guide along which'the material moves, a'disk cutter mounted to one side of the path of movementl of the material, means for rotating the disk cutter, means for positively moving the disk cutter along a path parallel to that of the moving material'in the direction and at a speed of the said material and for returning the cutter in the opposite direction, and means operative when the disk cutter is moving in the same direction as the material for moving the disk cutter vtoward and away from the guide partially into and out of the path of the material to sever the rotating material at a point continuously supported by the guide during the cutting operation. l

Y NATHAN SINGER. 

